import requests,re,json
from requests.exceptions import RequestException
from multiprocessing import pool


def get_one_page(url):
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36',
        'Accept-Language': 'zh-CN,zh;q=0.8'}
    try:
        res=requests.get(url,headers=headers)
        if res.status_code==200:
            return res.text
        return None
    except RequestException:
        return None

def parse_one_page(html):
    pattern = re.compile('<dd>.*?"board-index .*?>(\d+)</i>.*?data-src="(.*?)".*?title="(.*?)".*?<p class="star">(.*?)</p>.*?"releasetime">(.*?)</p>.*?class="integer">(\d+).</i><i class="fraction">(\d+)</i>.*?</dd>', re.S)
    items = re.findall(pattern, html);
    for item in items:
        yield {
            'index':item[0],
            'image':item[1],
            'title':item[2],
            'actor':item[3].strip()[3:],
            'time':item[4].strip()[5:],
            'score':item[5]+'.'+item[6]
        }
def write_to_file(content):
    with open('result.txt','a',encoding='utf-8') as f:
        f.write(json.dumps(content,ensure_ascii=False)+'\n')
        f.close()

def main(offset):
    url = 'https://maoyan.com/board/4?offset='+str(offset)
    data = parse_one_page(get_one_page(url))
    for item in data:
        write_to_file(item)

if __name__=='__main__' :
    for i in range(10):
        main(i*10)
    # 多进程抓取
    # pool=Pool()
    # pool.map(main,[i*10 for i in range(10)])



